Hi Uncle Jaque,

Re:
>I have found some historical evidence of the U.S Navy running a >British blockade in order to get relief aid to the Irish sometime in >the 1840's, and I'd like to get some input from others who know a >lot more about this part of History than I do.

In her book "Songs of American Sailormen" Joanna Colcord writes as an introduction to the song "The Jamestown Homeward Bound":
"The Jamestown was a sloop-of-war built in 1844 and is not to be confused with the Confederate gunboat of the same name. Her only claim to fame is that she was the relief ship sent by the United States government to Ireland to succor the victims of the famine of 1847."

Dave